Sewer and in home plumbing protection warrenty programs

[Michelle Moss]

I am a landlord in the Cleveland Ohio area. I have been considering signing up with one of the Warrenty  Programs that offer Sewer and in home plumbing coverage. They seem to charge a very reasonable per month fee for the service. I noticed there are a lot of companies who offer these programs, including Dominion and Cleveland Water, Homeserve etc. 

If anyone Has used one of these companies, or has experience with one of these programs, I would appreciate your input. 

Some of my concerns include are the kind of Plumbing companies these companies use when you call for service? Are they reputable contractors? 

Thank you in advance for your help!!